Connotea
CiteULike
del.ico.us
BibSonomyAbstract
GEOPHYSICAL RESEARCH LETTERS,
VOL. 33,
L20314,
4 PP., 2006
doi:10.1029/2006GL027952
Repeated large subduction zone earthquakes in the Nankai-Suruga trough: Evidence from submarine liquefactions
Graduate School of Science and Technology, Shizuoka University, Shizuoka, Japan
Subduction zones are generally characterized by large earthquakes that contribute about 90% of the total seismic moment worldwide, and can cause great damage from tsunamis such as the 2004 Sumatra Mw 9.0 earthquake. Here, we report recurrent large subduction zone earthquakes revealed by extensive submarine liquefactions formed in the Nankai-Suruga trough where the Philippine Sea plate is subducting beneath the Eurasian plate. Field evidence and grain-size analysis of liquefied deposits show that the multiple-liquefactions were repeatedly induced by strong earthquake shaking during the Pleistocene in the eastern Nankai-Suruga subduction zone. The recognition and analysis of submarine liquefactions provide reliable paleoseismic evidence in the Nankai-Suruga subduction zone.
Received 25 August 2006; accepted 19 September 2006; published 26 October 2006.
Citation: (2006), Repeated large subduction zone earthquakes in the Nankai-Suruga trough: Evidence from submarine liquefactions, Geophys. Res. Lett., 33, L20314, doi:10.1029/2006GL027952.
Cited By